This paper presents an approach for ego-motion estimation based on a Time-of-Flight (ToF) camera. It is applied in real-time on a mobile robot platform during mission. The proposed method utilizes the coherence of depth and reflectance data of ToF cameras by detecting image features on reflectance data and estimating the motion on related depth data. This motion estimate is fused with data from...

Several visual following robots have been proposed in recent years. However, many require the use of several, expensive sensors and often the majority of the image processing and other calculations are performed off-board. This paper proposes a simple and cost effective, yet robust visual following robot capable of tracking a general object with limited restrictions on target characteristics. T...

This white paper discusses the most common methods deployed to build up Real Time Location Systems (RTLS). These include Time of Arrival (ToA), Time Difference of Arrival (TDoA), Received Signal Strength (RSS), Time of Flight (ToF), and Round Trip Time (RTT). A special case of RTT, SDS-TWR, is described which offers a solution to the complexity, high power consumption, and high cost of most RTL...

A velocity selector is described which is designed for measurement of the total collision cross section of electrons in the energy region below one volt. The system determines the distributions of times of flight of single electrons over a measured path at selected pressures of a specimen gas. The electrons are generated by repetitive illumination of a photo-emitter by a spark gap, pass over a ...

The time-of-flight technique is employed in two of the instruments at the NIST Cold Neutron Research Facility (CNRF). A pulsed monochromatic beam strikes the sample, and the energies of scattered neutrons are determined from their times-of-flight to an array of detectors. The time-of-flight method may be used in a variety of types of experiments such as studies of vibrational and magnetic excit...

Microwaves can penetrate many obstructions that are opaque at visible wavelengths, however microwave imaging is challenging due to resolution limits associated with relatively small apertures and unrecoverable "stealth" regions due to the specularity of most objects at microwave frequencies. We demonstrate a multispectral time-of-flight microwave imaging system which overcomes these challenges ...

A new electronics system for time-of-flight measurements has been developed to meet the performance requirements of the Mark II Detector for operation at the PEP Storage Ring of the Stanford Linear Accelerator Center. This system incorporates high resolution time measurements with the capability to correct systemic errors from the scintillator and photomultiplier tubes. The correction technique...